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UltraFire BRC 18650 2600mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Bulk

UltraFire XSL 18650 2600mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Bulk
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UltraFire XSL 18650 2600mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Bulk
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Ultrafire 18650 2600mah Protected Rechargeable Lithium Battery

The Ultrafire 18650 2600mah Protected cell features a button top making it particularly compatible with many flashlight applications.

Rechargeable Lithium batteries are rapidly becoming a very economical way to lower the operating costs of Lithium-Powered flashlights. We offer a number of different options in order to meet any rechargeable needs. These are Protected batteries.

These fully protected cells simplify usage with their integrated PCB. Perfect for your single cell application these cells are not for pack building as doing so will defeat the PCB protection which is matched to the correct voltage on a single cell. If you are building a pack please choose one of our other cells and the appropriate PCB.

Features and Benefits:

  • With integrated PCB Protection!
  • Lithium Ion 18650 cylindrical rechargeable batteries
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
  • Unique PCB design and patent pending.
  • Higher energy density and lower weight than other types rechargeable batteries
  • Manufactured under ISO9001-2000 to assure quality
  • Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality and life time
  • Lighting or other device needing 3.7V power
  • Building portable power device needing high energy density and low weight

Product Specifications:

  • Capacity: Nominal&: 2600 mAh, Minimum: 2400 mAh
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.  UNIQUE INTERNAL PCB!
  • Dimensions:
    • Diameter 18.8+/-0.5 mm
    • Height 68.7+/- 0.5mm
  • Weight (Typical) Approx. 46 g
  • Voltage: 3.7V (also called 3.6V and 4.2V)
  • Cut-off Voltage: 2.5V
  • Internal Impedance: less or equal to 180  milliohm (with PTC)
  • Cycle Performance: 90% of initial capacity at 400 cycles
  • Cycle life: > 500 cycles
  • Charge: Current = 0.5C Voltage = 4.2 V End Current = 0.01 mA
  • Discharge: Current = 0.5C End Voltage = 3.0V

* Note: These higher capacity cells have a larger diameter than standard 18650's and may not fit all flashlights. Please verify dimension of flashlight or device. May not fit most Fenix flashlights.

Battery Size:18650
Battery Capacity:2600mAh
Battery Chemistry:Li-Ion
Battery Voltage:3.6 / 3.7
Battery Terminal Type:Button Top
Battery Shelf Life:3 Years
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.623oz
Product Dimensions:2.705" (L) x 0.74" (Diameter)
Country of Origin:CN
Associated Battery Sizes:168A, 18650, 19670, Protected 18650, Unprotected 18650
20 Reviews
75% (15)
20% (4)
0% (0)
5% (1)
0% (0)
85% Recommend this product (17 of 20 responses)
By Dave
Slatington, Pa
June 15, 2017
By Jacob
Bedford, OH
March 20, 2017
Good Battieries...
Got 6 of them, so 3 in the G30 and 3 extra to swap out when the others need to be charged up. Would buy some more, if it wasn't for the length, which is why I only gave 4 stars of them (plus haven't had them that long) .
ProsThey last longer than my other 18650 and power the G30 great.
ConsWith the button and I'm guessing the protection circuit, they are longer than regular 18650's, so they will not fit in every thing.
By Glen
Greenville, RI
September 17, 2016
Great value
Powerful battery, Keeps a charge
ProsPowerful, great value,
By Desertratgreg
Mohave, Az
February 6, 2016
Long lasting !
Bought 4 of these when I purchased my 900 lumen flashlight about 4 years ago. The factory supplied batteries are dead as well as some other after market batteries I purchased only 2 years ago. I use my light in all kinds of activities including construction and automotive work, 4-wheeling, boating and camping. These batteries hold a charge well and are much more rugged than many other brands available.
By Cort
Chicago Illinois
January 18, 2016
Good battery! Does as advertised
Good battery holds a charge and performs as it is advertised!
October 28, 2015
Très bonne batterie pour laser ou bloc de recharge.
By Chuck
September 4, 2015
Battery review
So far so good.Will buy again
By Matt
Gilbert, AZ
August 17, 2015
Good battery
I just received three of these. They charged fast and so far are working well
By Sonley R LeMay Jr
Corsicana, TX
June 28, 2015
Nitecor P 12 1000 Lumen flashlight
Ultrafire fits the nitecore p 12 1000 Lumen flashlight. It is supposedly a replacement for two CR 123 batteries. But my other slightly lower lumen flashlights won't accept it.
ProsGreat battery that is rechargeable.
ConsWon't necessarily fit other lights that use 2 CR 123 batteries.
By Avid user
June 10, 2015
Ultrafire 18650 XSL 2600mah Protected Button Top Rechargeable Lithium Battery Li-Ion
Great battery. Fits my high power headlamp with cree T6 led perfectly and the shipping from Battery junction was quick and inexpensive.
ProsLong lasting charge, with 2600 mah
By Jason
Spring Hill, FL
May 13, 2015
Great Battery
Works wonderful I now own 6 of them they fit in all my different flashlights without any issues!
ProsPrice and the life of the battery
By Doug
Lodge, SC
March 19, 2015
I ordered wrong batteries for my flashlight. I found I had another flashlight that the batteries would work. They work fine.
By Roger
United States
March 2, 2015
Ultrafire just plain work.
As the head line says, these batteries simply do what I want, and haven't failed.
Pros2600 mAh. The ones they replaced were 2400. Not a big deal for what I use em for, but the price is the same so why not?
By Bill
Sutton, WV
December 26, 2014
Rechargable Ultrafire-Great Battery
Good Battery, will continue to buy.
November 26, 2014
Keeps it charge
Excellent for Value
By nick
November 20, 2014
Must have!
By ed
August 27, 2014
rechargeable 18650
Very good battery, but only fits some flashlights. Diameter is too big by a couple of mm to fit my streamlight or some other 123a flashlights
ProsLong lasting charge
ConsDiameter to big by couple of mm.
By Bruce
August 22, 2013
great battery
I bought two of these batteries about two years ago. I have recharged them numerous times they just won\'t die. I recommend them to anyone who needs a good reliable battery :)
By Angelo Mysterioso
August 1, 2013
I bought 2 of these, the width is slightly oversized at the button end and they will not fit inside my battery tubes. Olight, Jetbeam, LumaPower... all are 18650 barrels and a big fat no go. Their customer service is excellent, I will call in the morning, I know they will make it right.
By Peter
June 4, 2012
Good experience
I have had nothing but good experience with these - used them extensively in my M20 Warrior and they last a very long time on brightest output.
3 Questions & 3 Answers
from Phoenix, AZ asked:
July 24, 2015
Will it fit into a Fenix TK75?
1 Answer
Yes, these will fit in the TK75.
Customer Service
on July 27, 2015

Frank Angelica
from Louisiana asked:
December 29, 2014
What is a PCB integrated protection system?
1 Answer
PCB provides added protection against over discharge and other potentially dangerous conditions.
Customer Service
on December 29, 2014

jeff tyson
from newport rhode island asked:
April 2, 2014
does the ultrafire 18650 xsl 2600mah fit in the terralux tt-4 ?
1 Answer
Yes, the TT-4 will take the Ultrafire 18650. The TT-4 will work with any 18650 Li-Ion battery.
Customer Service
on April 2, 2014

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